diff --git a/app/challenges/page.tsx b/app/challenges/page.tsx
index ecbcd44..e038e03 100644
--- a/app/challenges/page.tsx
+++ b/app/challenges/page.tsx
@@ -11,6 +11,7 @@ import CTFNotStarted from '@/components/CTFNotStarted';
 // Utils
 import { getChallenges } from '@/util/challenges';
 import { getMyProfile } from '@/util/profile';
+import { getAdminChallenges } from '@/util/admin';
 import { AUTH_COOKIE_NAME } from '@/util/config';
 
 
@@ -27,20 +28,46 @@ export default async function ChallengesPage() {
     if (profile.kind === 'badToken')
         return redirect('/logout');
 
-    return challenges.kind === 'goodChallenges' ? (
+    if (challenges.kind !== 'goodChallenges') return (
+        <CTFNotStarted />
+    );
+
+    // Support non-standard properties by sourcing them from the admin endpoint.
+    const adminData = await getAdminChallData();
+    let challs = challenges.data;
+
+    if (adminData) {
+        // Filter out challs with prereqs that are not met yet
+        const solved = new Set(profile.data.solves.map((c) => c.id));
+        challs = challs.filter((c) => !adminData[c.id].prereqs || adminData[c.id].prereqs!.every((p) => solved.has(p)));
+
+        // Inject desired properties back into client challenges
+        for (const c of challs) {
+            c.difficulty = adminData[c.id].difficulty;
+        }
+    }
+
+    return (
         <div className="container relative pt-32 pb-14 flex flex-col md:flex-row gap-6">
             <Filters
-                challenges={challenges.data}
+                challenges={challs}
                 solves={profile.data.solves}
             />
             <Challenges
-                challenges={challenges.data}
+                challenges={challs}
                 solves={profile.data.solves}
             />
 
             <DisplayToggle />
         </div>
-    ) : (
-        <CTFNotStarted />
-    )
+    );
+}
+
+async function getAdminChallData() {
+    if (!process.env.ADMIN_TOKEN) return;
+
+    const res = await getAdminChallenges(process.env.ADMIN_TOKEN);
+    if (res.kind === 'badToken') return;
+
+    return Object.fromEntries(res.data.map((c) => [c.id, c]));
 }
diff --git a/util/admin.ts b/util/admin.ts
index 2c8e2de..57b778b 100644
--- a/util/admin.ts
+++ b/util/admin.ts
@@ -2,9 +2,11 @@ import type { Challenge } from '@/util/challenges';
 import type { BadTokenResponse } from '@/util/errors';
 
 
-export type AdminChallenge = Challenge & {
+export type AdminChallenge = Exclude<Challenge, 'solves' | 'points' | 'sortWeight'> & {
     flag: string,
     points: { min: number, max: number }
+
+    prereqs?: string[], // Non-standard
 }
 
 type AdminChallengesResponse = {
@@ -15,9 +17,7 @@ type AdminChallengesResponse = {
 
 export async function getAdminChallenges(token: string): Promise<AdminChallengesResponse | BadTokenResponse> {
     const res = await fetch(`${process.env.API_BASE}/admin/challs`, {
-        headers: {
-            'Authorization': `Bearer ${token}`
-        }
+        headers: { 'Authorization': `Bearer ${token}` }
     });
 
     return res.json();
diff --git a/util/challenges.ts b/util/challenges.ts
index a8bf331..7816ede 100644
--- a/util/challenges.ts
+++ b/util/challenges.ts
@@ -11,6 +11,8 @@ export type Challenge = {
     sortWeight: number,
     solves: number,
     points: number,
+
+    difficulty?: string, // Non-standard
 }
 
 type FileData = {